David Walter, D.O.

Primary specialty

Child & Adolescent Psychiatry PhysicianTaxonomy code 2084P0804X

License

DO1537 Issued in ME

Practice address

25 Middle Street
Portland, ME 04101

Phone

(207) 321-8300

NPI assigned

May 9, 2007

Sex

Male

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in ME

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Psychiatry

Education

Philadelphia College of Osteopathic Medicine, 1993

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Acadia Hospital Corp.Group PAC ID 7719878495, 88 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Acadia Hospital Corp

  • Psychiatric Hospital
  • Bangor, ME
  • NPI 1215940523
  Medicare reassignment Care Compare group
• Sweetser

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Saco, ME
  • NPI 1538122445
  Medicare reassignment NPD
• Maine Behavioral Healthcare

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Biddeford, ME
  • NPI 1891733309
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1178668800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1759881600000",
    "number": "1487868394",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "25 MIDDLE STREET",
            "city": "PORTLAND",
            "state": "ME",
            "postal_code": "04101",
            "telephone_number": "207-829-2966"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "25 MIDDLE STREET",
            "city": "PORTLAND",
            "state": "ME",
            "postal_code": "04101",
            "telephone_number": "207-321-8300"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WALTER",
        "first_name": "DAVID",
        "credential": "D.O.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-05-09",
        "last_updated": "2025-10-08",
        "certification_date": "2025-10-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0804X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Child & Adolescent Psychiatry",
            "state": "ME",
            "license": "1537",
            "primary": false
        },
        {
            "code": "2084P0804X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Child & Adolescent Psychiatry",
            "state": "ME",
            "license": "DO1537",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "310050099",
            "state": "ME"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Heidi Walls, M.D.
• Christopher Walsh
• Melissa Lamb Walsh, L.M.T.
• Robert Walsh
• Melissa M Walshe, LCPC-CC
• Sarah Courtney Walter, PH.D.
• John L Walters, OD
• Mary Beth Walters, LCSW
• Debra V Walton, APRN BC
• Xiangyu Wang, MD

• Child & Adolescent Psychiatry Physician in Portland, ME
• Providers in Portland, ME by specialty
• Child & Adolescent Psychiatry Physician in Maine

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 8, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.